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| Progress 34 | January 20-March 4, 1988 |
| Progress 35 | March 23-May 5, 1988 |
| Progress 36 | May 13-June 5, 1988 |
| Progress 37 | July 18-August 12, 1988 |
| Progress 38 | September 9-November 23, 1988 |
| Progress 39 | December 25, 1988-February 7, 1989 | |
| Greater than average solar activity hastened the decay of the Mir complex from orbit. The engine and fuel supply of this Progress were used to change Mir’s orbital parameters to 340 km by 376 km, from 325 km by 353 km. According to Sergei Krikalev, onboard the station at this time, the altitude change was not noticeable from Mir’s viewports.[1] | ||
| Progress 40 | February 10-March 5, 1989 | |
| See Progress 28 entry. | ||
| Progress 41 | March 16, 1989-April 25, 1989 | |
| Many Progress missions served a psychological purpose as well as a logistics one. Psychologists in ground control had a hand in choosing morale-boosting treats for the space station crew. In addition, Progress cargoes usually included mail from loved ones and newspapers. Progress 41 carried to Mir postcards commemorating the 30th anniversary of Luna 1 (launched January 2, 1959), the first probe to pass near the Moon. A possible main engine failure prevented Progress 41 from making the usual controlled destructive reentry at the end of its mission. It underwent uncontrolled reentry on April 25, 1989.[2] | ||
| Progress 42 | May 5-May 27, 1990 | |
| Last of the old Progress resupply ships. Progress 42 was designed to interface with the Igla approach system and the Argon 16B orientation control system launched with Mir. For this reason, using the spacecraft contributed to delays in integration with the Mir complex of the new Salyut 5B orientation control computer delivered with the Kvant 2 module. | ||
